<template>
  <div class="appBox"> 
    测试项目
    <HelloWorld msg="lala lalal lalal " />
  </div>
</template>

<script>
export default {
  components: {},
};
</script>

<style>
.appBox{
  width: 500px;
  height:300px;
  background: grey;
}
</style>
